Fluorotellurite glasses with improved mid-infrared transmission

O’Donnell, Matthew; Miller, Cheryl A.; Furniss, David; Tikhomirov, V. K.; Seddon, Angela B.

doi:10.1016/j.jnoncrysol.2003.08.081

Cited by 118 publications

(87 citation statements)

References 27 publications

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“…Moreover, α OH − of TZF30-Ar is smaller than that of TZF30-O 2 , which suggests that the above reactions proceed more sufficiently in Ar atmosphere compared to O 2 atmosphere. 19 Actually, N OH − for TZF30-Ar (3.028 × 10 18 cm −3 ) is approximately 13 times smaller than the value (39.602 × 10 18 cm −3 ) found in TZF0 glass. Besides, the minimal α OH − (0.247 cm −1 ) is much lower in comparison with other tellurite glasses reported before, 22,23 demonstrating that the simultaneous utilization of fluoride and shielding gas is a more effective method to extract OH − out of the mid-infrared laser glass during the fabrication process.…”

Section: B Ftir Transmission Spectramentioning

confidence: 70%

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Enhanced 2.7 μm emission from Er3+ doped oxyfluoride tellurite glasses for a diode-pump mid-infrared laser

Zhang¹,

Zhang²,

Yuan³

et al. 2014

AIP Advances

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The influence of fluoride and shielding gas (O2 or Ar) on the physical and spectroscopic properties of Er3+ doped TeO2-ZnO-ZnF2 glass system is investigated. The larger electronegativity of F than O accounts for the gradual decrease of refractive index, density, and J-O parameters with increasing ZnF2. An analysis on Fourier transform infrared transmission spectra reveals that the absorption coefficient of OH− around 3 μm as low as 0.247 cm−1 can be achieved when 30 mol% ZnF2 containing sample is treated with Ar gas during glass melting process. The reduction of OH− groups combined with the low multiphonon relaxation rate (207 s−1) contributes to the enhanced emissions at 1.5 and 2.7 μm, along with prolonged lifetimes of 4I11/2 and 4I13/2 levels. A high branching ratio (17.95%) corresponding to the Er3+: 4I11/2 → 4I13/2 transition, the large absorption and emission cross section (0.44 × 10−20 cm2 and 0.45 × 10−20 cm2), and good gain cross section demonstrate that oxyfluoride tellurite glass could be a promising material for a diode-pump 2.7 μm fiber laser.

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Section: B Ftir Transmission Spectramentioning

confidence: 70%

“…− O-Te≡. 18,19 047101 The absorption coefficient (α OH − ) and concentration of OH − (N OH − ) in the glass network can be evaluated with the following two equations:…”

Section: B Ftir Transmission Spectramentioning

confidence: 99%

Enhanced 2.7 μm emission from Er3+ doped oxyfluoride tellurite glasses for a diode-pump mid-infrared laser

Zhang¹,

Zhang²,

Yuan³

et al. 2014

AIP Advances

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“…The band around 1385 cm -1 is also observed in TPBKZFEr05 glass and can be attributed to the B-O -stretching vibrations of BO 3 units in metaborate, pyroborate and orthoborate groups [15]. The OH content in the glass system is reduced by the presence of fluorine and as a result the intensity of absorption due to the O-H group is negligible [16].…”

Section: Vibrational Modes Of the Glasses: Ftir And Micro-raman Analysismentioning

confidence: 87%

NIR emission studies and dielectric properties of Er3+-doped multicomponent tellurite glasses

Sajna

Thomas

Jayakrishnan

et al. 2016

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Multicomponent tellurite glasses containing altered concentrations of Er 2 O 3 (ranging from 0 to 1 mol%) were prepared by the standard melt quenching technique. Investigations through energy dispersive X-ray spectroscopy (EDS), Raman scattering spectroscopy, FTIR spectroscopy, NIR emission studies and dielectric measurement techniques were done to probe their compositional, structural, spectroscopic and dielectric behaviour. The influence of erbium ion concentration on the infrared emission (~1.53 m) of these glasses and their respective lifetimes were measured. From the measured capacitance and dissipation factor, the relative permittivity, dielectric loss and the conductivity were computed; which furnish the dielectric nature of the multicomponent tellurite glasses that depend on the frequency of the applied LCR meter. Assuming the ideal Debye behaviour as substantiated by Cole-Cole plot, an examination of the real and imaginary parts of impedance is performed. The power-law and Cole-Cole parameters were resolved for all the glass samples. From the assessment of the NIR emission analysis and dielectric properties of the glass samples, it is manifested that the Er 3+ ion concentration has played a vital role in tuning the optical and dielectric properties and the 0.5 mol% Er 3+-doped glass is confirmed as the finest composition.

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“…Figure 6 compares the experimental spectrum of the bulk glass with those of the RT-and AN-films. All the spectra exhibit a broad band in the range from 2500 cm -1 to 3500 cm -1 , which can be assigned to stretching vibrations of OH -groups [9,15]. It is clearly seen that the absorbance of the bulk glass (α M = 0.2 cm -1 ) is much smaller than that of the as-grown (α M = 600 cm -1 ) or annealed film glasses (α M = 50-160 cm -1 ).…”

Section: Structure and Morphology Of Thin Film Glassesmentioning

confidence: 99%

“…However, one of the main drawbacks of tellurite glasses is the presence of hydroxyl (OH -) groups that quenches radiative emission of RE ions [12]. The addition of fluorine reduces the OH -concentration in fluorotellurite glasses [13,14,15] and leads to a reduction of electron-phonon coupling [13]. The decrease of the multiphonon relaxation rate increases the quantum efficiency from excited states of RE ions, thus increasing their emission lifetime [16,17].…”

Section: Introductionmentioning

confidence: 99%

Er3+-doped fluorotellurite thin film glasses with improved photoluminescence emission at 1.53 µm

Morea

Miguel

Fernandez

et al. 2016

Journal of Luminescence

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Transparent oxyfluoride tellurite thin film glasses have been produced at room temperature by pulsed laser deposition in O 2 atmosphere from an Er-doped TeO 2 -ZnOZnF 2 bulk glass. Thin film glasses present high refractive index (n≥ 1.95) and good transparency (T≥ 80%) in the visible (λ> 400nm) and near infrared range. However, their photoluminescence (PL) performance at 1.5 µm is poor. Thermal annealing at moderate temperatures (T≤ 315 ºC), well below glass crystallization, increases the PL 2 intensity by more than one order of magnitude as well as the PL lifetime up to τ≈ 3.3 ms. Film glasses present a larger fraction of TeO 3 trigonal pyramids than the bulk glass and a very large OH -content. The structure and composition of film glasses does not change upon annealing and thus the activation of the PL response is related to the improvement of the surface morphology and the significant decrease of their OHcontent.

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Fluorotellurite glasses with improved mid-infrared transmission

Cited by 118 publications

References 27 publications

Enhanced 2.7 μm emission from Er3+ doped oxyfluoride tellurite glasses for a diode-pump mid-infrared laser

Enhanced 2.7 μm emission from Er3+ doped oxyfluoride tellurite glasses for a diode-pump mid-infrared laser

NIR emission studies and dielectric properties of Er3+-doped multicomponent tellurite glasses

Er3+-doped fluorotellurite thin film glasses with improved photoluminescence emission at 1.53 µm

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